You're free to use the disk images to do your own cool things. The
Stripe code on the disk images is licensed under a BSD license. Third
party code included in the disk images is subject to its own license,
which is included. We'd appreciate you letting folks know where you
got the original code and we'd love to hear what cool things you're
doing (but that's up to you).

Janos Gyerik has also created a Live
CD image of the Stripe CTF that makes it even easier to get
started.

We ran a
capture the flag
security challenge a few weeks ago. Expecting only one or two hundred people
to look at it over the course of its week-long run, we were blown away when
we found 900 simultaneous users logged in just a couple hours after we
launched. Thanks for bearing with us while we provisioned more servers to
handle the load.

Simultaneous users over time

Our users were largely anonymous, but we had people log in from 12,000 unique
IP addresses. Among them we saw everything from startups and security firms to
major universities and Fortune 100 technology companies. It was awesome to see
participants hailing from all around the world.

By popular demand, we've created virtual machine images that you can use to run
your very own Stripe CTF server. They're available in the Amazon Web Services
us-west-1 and us-east-1 regions as AMIs owned by account
928171847254. When you log in as user ctf,
you'll see instructions on how to get it up and running. We recommend using VPC
so you can set outbound firewall rules.